Widely used in water treatment processes, this chemical effectively removes suspended solids and phosphates from wastewater by acting as a coagulant. It is also employed in etching copper-based materials in printed circuit board manufacturing due to its ability to oxidize metals. In industrial settings, it serves as a catalyst in organic synthesis, particularly in Friedel-Crafts reactions. Additionally, it is utilized in the production of other iron compounds and in sludge dewatering processes at treatment plants. Its disinfectant properties make it suitable for odor control in sewer systems by precipitating hydrogen sulfide.